Chain



Patented June 27, 1922.

c. c. DAVIS.

CHAIN.

APPLICATION FILED JULYZB, 1920.

55 /iwm CHARLES GLARANCE DAVIS, OF RICHMOND, VIRGINIA.

CHAIN.

' Application filed July as,

To all whom it may concern Be it known that I, CHARLES C. DAVIS, acitizen of the United States, residing in Richmond, Henrico County,Virginia, have invented certain Improvements in Chains, of which thefollowing is a specification.

My invention relates to certain improvements in conveying, or carrying,chains of the roller type, which travel on rails and pass aroundsprocket wheels that are driven.

The object of my invention is to design the links of the chain sothat-the rollers will at all times bear upon the rails, even when therollershave been reduced by excessive wear, the rollers traveling on therails on the carrying and on the return runs.

In the accompanying drawings:

Fig. 1 is a-side View of a portion of a chain illustrating my invention;

Fig. 2 is a sectional view on the line 22, Fig. 1, showing the chain onthe carrylng run; and

Fig. 3 is a sectional View, showing the chain on the return run.

1 is a rail arranged to support the chain on the carrying run. 2 is arail arranged to support the chain on the return run. The chain consistsof a series of links 3 connected together by pivot pins 4, clearly shownin Fig. 1. Each link is made in two parts and the side members aregreater in width at one end than at the opposite end so that the sidemembers of one'link overlap the side members of an adjoining link, asclearly shown in Figs. 1 and 2. The

pivot pins 4 are riveted to form heads which retain the links in properalignment. Each section of each link, in the present instance, has acurved socket 5 for the reception of a stick 6, as shown by dotted linesin Fig. 1, on which material can be hung, as, in the present instance,the chain is used for carrying material through a drying apparatus.

Each section of each link has an extension 7 forming a bearingsurrounding the pivot pin 4, as shown in Fig. 2, and mounted on theextensions 7 are the rollers 8, which travel on the rails 1 and 2. It isthe usual practice to make the links of the chain so that they are abovethe upper surface of the carrying rail. The is usually madeSpecification of Letters Patent. patentgd Jun 27, 1922 1920. Serial No.399,644.

wider than the chain, consequently, as the rollers wear, the links areallowed to come 1n contact with the upper surface of the rail and to rubon the rail, materially increasing the friction.

y my invention, I design the chain and the rails so that the chain iscarried at all times by the rollers, irrespective of the extent of wear.

Each link has a depending portion 9, wh1ch extends on each side of thenarrow rail 1, as clearly shown in Fig. 2. These portlons 9 tend toretain the rollers in proper positlon on the carrying rail 1, dispensingwith other guides and allowing the rollers to hear at all times upon therail, as the some instances, the chain may be composed of alternatedplain and socketed links, and some of the links may have the extensions8, while other links may be plain.

' I claim:

1. The combination of a narrow rail; a chain adapted to travel over saidrail, said chain consisting of a series of links pivotally connected,the side members of the links belng spaced apart a greater distance thanthe Width of the rail and extending on each side of the" rail; and asingle series of rollers mounted on the pivots of the links of the chainand bearing upon the rail.

2. The combination of a narrow rail; a chain consisting of a series oflinks piv-. otally connected, each link being made in two parts andforming side members, the side members of each link being spaced apart agreater distance than the width of the rail, each link having anextension at the pivot; a rivet passing through the ex,-

tensions of the links and through the side than the rail, the sidemembers of each linkfloo extending on each side of the rail.

CHARLES CLARANCE DAVIS.

